<!DOCTYPE html><html lang="zh-Hans"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"><meta name="description" content="iOS 手势之滑动清屏等"><meta name="keywords" content="iOS"><meta name="author" content="kyren"><meta name="copyright" content="kyren"><title>iOS 手势之滑动清屏等 | Kyren's Blog</title><link rel="shortcut icon" href="/melody-favicon.ico"><link rel="stylesheet" href="/css/index.css?version=1.9.0"><link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/font-awesome@latest/css/font-awesome.min.css?version=1.9.0"><meta name="format-detection" content="telephone=no"><meta http-equiv="x-dns-prefetch-control" content="on"><link rel="dns-prefetch" href="https://cdn.jsdelivr.net"><link rel="dns-prefetch" href="https://hm.baidu.com"><script>var _hmt = _hmt || [];
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<p>可以判断拖动方向</p>
<figure class="highlight objectivec"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"><span class="built_in">CGPoint</span> translantion = [<span class="built_in">UIPanGestureRecognizer</span> translationInView:<span class="built_in">UIView</span>];</span><br><span class="line">ABS(translantion.x)/ABS(translantion.y) &gt; <span class="number">1</span></span><br><span class="line"><span class="comment">//即判断是否水平移动(x轴拖动距离大于y轴拖动距离)</span></span><br></pre></td></tr></table></figure>

<p><code>velocityInView</code>:（设置拖拽速度，单位：像素&#x2F;秒）<br><code>velocityInView</code> 返回指定坐标系统当中拖动的速度，x,y分别代表x轴y轴的拖动速度(矢量)</p>
<figure class="highlight objectivec"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"><span class="built_in">CGPoint</span> velocity = [<span class="built_in">UIPanGestureRecognizer</span> velocityInView:<span class="built_in">UIView</span>];</span><br><span class="line">velocity.x &gt; <span class="number">0</span> <span class="comment">//向右 x,y正负值 判断上下左右</span></span><br></pre></td></tr></table></figure>

<p>实例应用</p>
<figure class="highlight objectivec"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// 枚举值，包含水平移动方向和垂直移动方向</span></span><br><span class="line"><span class="keyword">typedef</span> <span class="built_in">NS_ENUM</span>(<span class="built_in">NSInteger</span>, PanDirection)&#123;</span><br><span class="line">    PanDirectionHorizontalMoved, <span class="comment">//横向移动</span></span><br><span class="line">    PanDirectionVerticalMoved    <span class="comment">//纵向移动</span></span><br><span class="line">&#125;;</span><br><span class="line"></span><br><span class="line"><span class="keyword">static</span> PanDirection panDirection;</span><br><span class="line">- (<span class="type">void</span>)panGestureOnMainVC2:(<span class="built_in">UIPanGestureRecognizer</span> *)sender&#123;</span><br><span class="line">    <span class="keyword">if</span> (sender.numberOfTouches == <span class="number">0</span>) &#123;</span><br><span class="line">        <span class="built_in">NSLog</span>(<span class="string">@&quot;手指离开屏幕&quot;</span>);</span><br><span class="line">    &#125;</span><br><span class="line">    <span class="comment">//根据在view上Pan的位置，确定是跳音量、亮度</span></span><br><span class="line">    <span class="comment">// CGPoint locationPoint = [pan locationInView:self];</span></span><br><span class="line">    <span class="comment">// 我们要响应水平移动和垂直移动</span></span><br><span class="line">    <span class="comment">// 根据上次和本次移动的位置，算出一个速率的point</span></span><br><span class="line">    <span class="built_in">CGPoint</span> veloctyPoint = [sender velocityInView:<span class="keyword">self</span>.view];</span><br><span class="line">    <span class="built_in">CGPoint</span> transPoint = [sender translationInView:<span class="keyword">self</span>.view];</span><br><span class="line">    <span class="keyword">switch</span> (sender.state) &#123;</span><br><span class="line">        <span class="keyword">case</span> <span class="built_in">UIGestureRecognizerStateBegan</span>:&#123;</span><br><span class="line">            <span class="built_in">NSLog</span>(<span class="string">@&quot;x:%f  y:%f   aaa:%f,bbb:%f&quot;</span>,veloctyPoint.x, veloctyPoint.y,transPoint.x,transPoint.y);</span><br><span class="line">            <span class="comment">// 使用绝对值来判断移动的方向</span></span><br><span class="line">            <span class="built_in">CGFloat</span> x = fabs(veloctyPoint.x);</span><br><span class="line">            <span class="built_in">CGFloat</span> y = fabs(veloctyPoint.y);</span><br><span class="line">            <span class="keyword">if</span> (x &gt; y) &#123; <span class="comment">// 水平移动</span></span><br><span class="line">                panDirection = PanDirectionHorizontalMoved;</span><br><span class="line">            &#125;<span class="keyword">else</span> <span class="keyword">if</span> (x &lt; y)&#123; <span class="comment">// 垂直移动</span></span><br><span class="line">                panDirection = PanDirectionVerticalMoved;</span><br><span class="line">            &#125;</span><br><span class="line">        &#125;</span><br><span class="line">            <span class="keyword">break</span>;</span><br><span class="line">        <span class="keyword">case</span> <span class="built_in">UIGestureRecognizerStateChanged</span>:&#123;</span><br><span class="line">            <span class="keyword">switch</span> (panDirection) &#123;</span><br><span class="line">                <span class="keyword">case</span> PanDirectionHorizontalMoved:&#123;</span><br><span class="line"></span><br><span class="line">                    [<span class="keyword">self</span> horizontalMoved:veloctyPoint.x]; <span class="comment">// 水平移动的方法只要x方向的值</span></span><br><span class="line">                    <span class="keyword">break</span>;</span><br><span class="line">                &#125;</span><br><span class="line">                <span class="keyword">case</span> PanDirectionVerticalMoved:&#123;</span><br><span class="line">                    [<span class="keyword">self</span> verticalMoved:veloctyPoint.y]; <span class="comment">// 垂直移动方法只要y方向的值</span></span><br><span class="line">                    <span class="keyword">break</span>;</span><br><span class="line">                &#125;</span><br><span class="line">                <span class="keyword">default</span>:</span><br><span class="line">                    <span class="keyword">break</span>;</span><br><span class="line">            &#125;</span><br><span class="line"></span><br><span class="line">        &#125;</span><br><span class="line">            <span class="keyword">break</span>;</span><br><span class="line">        <span class="keyword">case</span> <span class="built_in">UIGestureRecognizerStateEnded</span>:&#123;</span><br><span class="line">            <span class="comment">// 移动结束也需要判断垂直或者平移</span></span><br><span class="line">            <span class="comment">// 比如水平移动结束时，要快进到指定位置，如果这里没有判断，当我们调节音量完之后，会出现屏幕跳动的bug</span></span><br><span class="line">            <span class="built_in">NSLog</span>(<span class="string">@&quot;UIGestureRecognizerStateEnded&quot;</span>);</span><br><span class="line">            <span class="keyword">switch</span> (panDirection) &#123;</span><br><span class="line">                <span class="keyword">case</span> PanDirectionHorizontalMoved:&#123;<span class="comment">//快进结束</span></span><br><span class="line"></span><br><span class="line">                &#125;</span><br><span class="line">                    <span class="keyword">break</span>;</span><br><span class="line">                <span class="keyword">case</span> PanDirectionVerticalMoved:&#123; <span class="comment">//垂直移动结束后，隐藏音量控件 且，把状态改为不再控制音量</span></span><br><span class="line"></span><br><span class="line">                &#125;</span><br><span class="line">                    <span class="keyword">break</span>;</span><br><span class="line"></span><br><span class="line">                <span class="keyword">default</span>:</span><br><span class="line">                    <span class="keyword">break</span>;</span><br><span class="line">            &#125;</span><br><span class="line">        &#125;</span><br><span class="line">            <span class="keyword">break</span>;</span><br><span class="line"></span><br><span class="line">        <span class="keyword">default</span>:</span><br><span class="line">            <span class="keyword">break</span>;</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>


<p>设置最小滑动距离，相比用屏幕宽度*0.5为或滑动方向为标准判断是否清屏体验要好。</p>
<figure class="highlight objectivec"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line"><span class="built_in">UIView</span> *bottomView;</span><br><span class="line">- (<span class="type">void</span>)viewDidLoad &#123;</span><br><span class="line">    [<span class="variable language_">super</span> viewDidLoad];</span><br><span class="line">    <span class="comment">// Do any additional setup after loading the view.</span></span><br><span class="line">    <span class="keyword">self</span>.view.backgroundColor=[<span class="built_in">UIColor</span> whiteColor];</span><br><span class="line"></span><br><span class="line">    <span class="built_in">UIView</span> *panview =[[<span class="built_in">UIView</span> alloc]initWithFrame:<span class="keyword">self</span>.view.bounds];</span><br><span class="line">    panview.backgroundColor=[<span class="built_in">UIColor</span> orangeColor];</span><br><span class="line">    [<span class="keyword">self</span>.view addSubview:panview];</span><br><span class="line">    bottomView=panview;</span><br><span class="line">    [<span class="keyword">self</span>.view addGestureRecognizer:[[<span class="built_in">UIPanGestureRecognizer</span> alloc] initWithTarget:<span class="keyword">self</span> action:<span class="keyword">@selector</span>(panGestureOnMainVC:)]];</span><br><span class="line">  &#125;</span><br></pre></td></tr></table></figure>

<figure class="highlight objectivec"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">#<span class="keyword">pragma</span> mark---滑动清屏幕功能</span></span><br><span class="line"><span class="comment">//最小滑动间距</span></span><br><span class="line"><span class="keyword">static</span> <span class="built_in">CGFloat</span> <span class="keyword">const</span> MIN_SPACE_VALUE= <span class="number">50.0</span>;</span><br><span class="line">-(<span class="type">void</span>)panGestureOnMainVC:(<span class="built_in">UIPanGestureRecognizer</span> *)sender</span><br><span class="line">&#123;</span><br><span class="line">    <span class="comment">//  获取平移值(//这个是获取手指从初始位置移动的偏移量)</span></span><br><span class="line">    <span class="built_in">CGPoint</span> translation = [sender translationInView:<span class="keyword">self</span>.view];</span><br><span class="line">    <span class="keyword">if</span> (sender.state == <span class="built_in">UIGestureRecognizerStateBegan</span>) &#123;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="built_in">UIView</span> *panView= bottomView;</span><br><span class="line">    panView.transform = <span class="built_in">CGAffineTransformTranslate</span>(panView.transform, translation.x, <span class="number">0</span>);</span><br><span class="line"></span><br><span class="line">    <span class="comment">// 清零移动叠加</span></span><br><span class="line">    <span class="comment">//再把形变设置为0，不然会因为不断调用这个方法，值会不断叠加，，</span></span><br><span class="line">    <span class="comment">//例如从0 - 3的距离应该只移动3，但是却变1+2+3 = 6，移动了6的距离</span></span><br><span class="line">    [sender setTranslation:<span class="built_in">CGPointZero</span> inView:<span class="keyword">self</span>.view];</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">    <span class="comment">//获取右边极限位置</span></span><br><span class="line">    <span class="built_in">CGAffineTransform</span>  rightScopeTransform=<span class="built_in">CGAffineTransformMakeTranslation</span>(<span class="keyword">self</span>.view.frame.size.width, <span class="number">0</span>);</span><br><span class="line">    <span class="comment">//右边极限位置</span></span><br><span class="line">    <span class="keyword">if</span> (panView.transform.tx &gt; rightScopeTransform.tx) &#123;</span><br><span class="line">        panView.transform = rightScopeTransform;</span><br><span class="line">    &#125;<span class="keyword">else</span> <span class="keyword">if</span> (panView.transform.tx &lt; <span class="number">0.0</span>)&#123;</span><br><span class="line">    <span class="comment">//左边极限位置</span></span><br><span class="line">        panView.transform=<span class="built_in">CGAffineTransformMakeTranslation</span>(<span class="number">0</span>, <span class="number">0</span>);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="built_in">CGPoint</span> veloctyPoint = [sender velocityInView:<span class="keyword">self</span>.view];</span><br><span class="line">    <span class="comment">//    当托拽手势结束时执行</span></span><br><span class="line">    <span class="keyword">if</span> (sender.state == <span class="built_in">UIGestureRecognizerStateEnded</span>)</span><br><span class="line">    &#123;</span><br><span class="line">        [<span class="built_in">UIView</span> animateWithDuration:<span class="number">0.2</span> delay:<span class="number">0</span> options:<span class="built_in">UIViewAnimationOptionCurveEaseIn</span> animations:^&#123;</span><br><span class="line">            <span class="keyword">if</span> (veloctyPoint.x&gt;<span class="number">0</span>) &#123;<span class="comment">//向右</span></span><br><span class="line">                <span class="keyword">if</span> (panView.transform.tx&lt;MIN_SPACE_VALUE) &#123;</span><br><span class="line">                    panView.transform = <span class="built_in">CGAffineTransformIdentity</span>;</span><br><span class="line">                &#125;<span class="keyword">else</span>&#123;</span><br><span class="line">                    panView.transform=rightScopeTransform;</span><br><span class="line">                &#125;</span><br><span class="line">            &#125;<span class="keyword">else</span>&#123;<span class="comment">//向左</span></span><br><span class="line">                <span class="keyword">if</span> (panView.transform.tx&gt;(<span class="keyword">self</span>.view.frame.size.width-MIN_SPACE_VALUE)) &#123;</span><br><span class="line">                    panView.transform=rightScopeTransform;</span><br><span class="line">                &#125;<span class="keyword">else</span>&#123;</span><br><span class="line">                    panView.transform = <span class="built_in">CGAffineTransformIdentity</span>;</span><br><span class="line">                &#125;</span><br><span class="line">            &#125;</span><br><span class="line">        &#125; completion:^(<span class="type">BOOL</span> finished) &#123;</span><br><span class="line"></span><br><span class="line">        &#125;];</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure></div></article><div class="post-copyright"><div class="post-copyright__author"><span class="post-copyright-meta">文章作者: </span><span class="post-copyright-info"><a href="mailto:undefined">kyren</a></span></div><div class="post-copyright__type"><span class="post-copyright-meta">文章链接: </span><span class="post-copyright-info"><a href="http://huluo666.gitee.io/2016/09/30/iOS 手势之滑动清屏等/">http://huluo666.gitee.io/2016/09/30/iOS 手势之滑动清屏等/</a></span></div><div class="post-copyright__notice"><span class="post-copyright-meta">版权声明: </span><span class="post-copyright-info">本博客所有文章除特别声明外，均采用 <a target="_blank" rel="noopener" href="https://creativecommons.org/licenses/by-nc-sa/4.0/">CC BY-NC-SA 4.0</a> 许可协议。转载请注明来自 <a href="http://huluo666.gitee.io">Kyren's Blog</a>！</span></div></div><div class="post-meta__tag-list"><a class="post-meta__tags" href="/tags/iOS/">iOS</a></div><nav id="pagination"><div class="prev-post pull-left"><a href="/2016/10/01/iOS%20%E5%B8%B8%E7%94%A8%E8%AE%A1%E7%AE%97/"><i class="fa fa-chevron-left">  </i><span>iOS常用计算</span></a></div><div class="next-post pull-right"><a href="/2016/09/28/Java%E5%AD%A6%E4%B9%A0%20%E7%B1%BB%E5%9E%8B%E8%BD%AC%E6%8D%A2%E4%B8%8E%E8%BF%90%E7%AE%97%2002/"><span>Java学习 类型转换与运算 02</span><i class="fa fa-chevron-right"></i></a></div></nav></div></div><footer><div class="layout" id="footer"><div class="copyright">&copy;2022 By kyren</div><div class="framework-info"><span>驱动 - </span><a target="_blank" rel="noopener" href="http://hexo.io"><span>Hexo</span></a><span class="footer-separator">|</span><span>主题 - </span><a target="_blank" rel="noopener" href="https://github.com/Molunerfinn/hexo-theme-melody"><span>Melody</span></a></div><div class="footer_custom_text">hitokoto</div><div class="busuanzi"><script async src="//busuanzi.ibruce.info/busuanzi/2.3/busuanzi.pure.mini.js"></script><span id="busuanzi_container_page_pv"><i class="fa fa-file"></i><span id="busuanzi_value_page_pv"></span><span></span></span></div></div></footer><i class="fa fa-arrow-up" id="go-up" aria-hidden="true"></i><script src="https://cdn.jsdelivr.net/npm/animejs@latest/lib/anime.min.js"></script><script src="https://cdn.jsdelivr.net/npm/jquery@latest/dist/jquery.min.js"></script><script src="https://cdn.jsdelivr.net/npm/@fancyapps/fancybox@latest/dist/jquery.fancybox.min.js"></script><script src="https://cdn.jsdelivr.net/npm/velocity-animate@latest/velocity.min.js"></script><script src="https://cdn.jsdelivr.net/npm/velocity-ui-pack@latest/velocity.ui.min.js"></script><script src="/js/utils.js?version=1.9.0"></script><script src="/js/fancybox.js?version=1.9.0"></script><script src="/js/sidebar.js?version=1.9.0"></script><script src="/js/copy.js?version=1.9.0"></script><script src="/js/fireworks.js?version=1.9.0"></script><script src="/js/transition.js?version=1.9.0"></script><script src="/js/scroll.js?version=1.9.0"></script><script src="/js/head.js?version=1.9.0"></script><script src="/js/search/local-search.js"></script><script>if(/Android|webOS|iPhone|iPod|iPad|BlackBerry/i.test(navigator.userAgent)) {
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